One of the best ways to see the epic devastation of New Orleans is by helicopter. The mayor and Chief Compass took Oprah on a Blackhawk ride to see how the deluge has swallowed everything: houses, trains, boats and cars. "While most of the people have evacuated, the signs of their desperation remain," Oprah says. "One of the things that I was most moved by was this 'HELP' sign written on the top of the roof."